docker-compose-example.yml

version: '3.8'
services:
  mongo:
    image: mongo
    restart: always
    ports:
      - '5100:27017'
    volumes:
      - ./mongo/init-mongo.js:/docker-entrypoint-initdb.d/init-mongo.js:ro
      - mongodb:/data/db
    environment:
      MONGO_INITDB_DATABASE: challenge
      MONGO_INITDB_ROOT_USERNAME: root
      MONGO_INITDB_ROOT_PASSWORD: SiybNkozPC4x7iHaNVFH
  server:
    env_file:
      - '.env'
    build:
      context: ./
    volumes:
      - .:/home/node
      - /home/node/node_modules
      - /home/node/imgs
    restart: always
    depends_on:
      - mongo
    ports:
      - '6100:8080'
  development:
    image: node:12-alpine
    env_file:
      - '.env'
    volumes:
      - .:/app
      - nodemodules:/app/nodemodules
      - imgs:/app/imgs
    working_dir: /app
    command: npm run dev
    depends_on:
      - mongo
    ports:
      - '7100:3000'
    environment:
      - NODE_ENV=development
      - PORT=3000
volumes:
  mongodb:
  nodemodules:
  imgs:

Dockerfile

# PRODUCTION DOCKERFILE
# ---------------------
# Sourced from: https://github.com/Saluki/nestjs-template/blob/master/Dockerfile
# 
# This Dockerfile allows to build a Docker image of the Express application
# and based on a NodeJS 12 image. The multi-stage mechanism allows to build
# the application in a "builder" stage and then create a lightweight production
# image containing the required dependencies and the JS build files.
# 
# Dockerfile best practices
# https://docs.docker.com/develop/develop-images/dockerfile_best-practices/
# Dockerized NodeJS best practices
# https://github.com/nodejs/docker-node/blob/master/docs/BestPractices.md
# https://www.bretfisher.com/node-docker-good-defaults/
# http://goldbergyoni.com/checklist-best-practice-of-node-js-in-production/

FROM node:12-alpine as builder

ENV NODE_ENV build

USER node
WORKDIR /home/node

COPY . /home/node

RUN npm ci \
    && npm run build

# ---

FROM node:12-alpine

ENV NODE_ENV production

USER node
WORKDIR /home/node

COPY --from=builder /home/node/package*.json /home/node/
COPY --from=builder /home/node/dist/ /home/node/dist/

RUN npm ci

CMD ["node", "dist/server.js"]